Aubess 16A Mini Smart Module Switch
Available from:
Aliexpress.com
Wi-Fi Module:
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The BL2028N can be replaced with an ESP8266EX, ESP-02S which is pin-compatible. It requires a custom setup, which is similar to Athom 3-Way Mini Relay Switch Module (RS01), but not identical:
{"NAME":"Aubess-RS01","GPIO":[0,0,0,0,576,0,0,0,224,32,160,0,0,0],"FLAG":0,"BASE":18}